Power resistor targets demanding environments

Corpus Christi, Tex.  TT electronics IRC Advanced Film Division has developed a 50-watt power resistor housed in a TO-220 package for automotive, industrial and high-frequency power applications. The MHP series power resistor features high stability film resistance elements.

The MHP series resistors feature low inductance at less than 50 nH. The series provides a resistance range from 0.01 ohms to 220 ohms with standard tolerances of &plusmn1% and &plusmn5%, and temperature coefficient resistance (TCR) values from 50 ppm/°C to 250 ppm/°C. Thermal resistance is 2.3°C/W, dielectric withstanding voltage is 2000 Vdc, and the maximum operating voltage is 500 V. The operating temperature range is -55°C to 155°C. Custom devices are available. Click the link for the MHP series datasheet.

To achieve a dielectric withstanding voltage of 2000 Vdc, IRC isolated the resistance element from the copper mounting tab by an alumina ceramic layer. As a result, it provides high insulation resistance between the terminals and the table and very low thermal resistance, according to the company, making the series suitable for applications in circuits and power supplies such as high frequency snubber and pulse handling circuits, motor control and drive circuits, and switch mode power supplies. Other applications include load resistors, automotive electronics, industrial power equipment, UPS systems, and industrial computers.

Pricing for the MHP series resistor is $1.80 each in quantities of 1,000. Lead time is from stock to six to eight weeks.